39428105 has 4 divisors (see below), whose sum is σ = 47313732. Its totient is φ = 31542480.

The previous prime is 39428099. The next prime is 39428111. The reversal of 39428105 is 50182493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50182493 = 691 ⋅72623.

It is an interprime number because it is at equal distance from previous prime (39428099) and next prime (39428111).

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 35188624 = 2059^2 + 5932^2 .

It is not a de Polignac number, because 39428105 - 2⁴ = 39428089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942806 + ... + 3942815.

It is an arithmetic number, because the mean of its divisors is an integer number (11828433).

Almost surely, 2^39428105 is an apocalyptic number.

It is an amenable number.

39428105 is a deficient number, since it is larger than the sum of its proper divisors (7885627).

39428105 is an equidigital number, since it uses as much as digits as its factorization.

39428105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885626.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 39428105 is about 6279.1802808965. The cubic root of 39428105 is about 340.3574815611.

The spelling of 39428105 in words is "thirty-nine million, four hundred twenty-eight thousand, one hundred five".